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CSES Problem Set

Distinct Numbers


Task | Statistics


CSES - Distinct NumbersCSES - Distinct Numbers

Time limit:1.00 s Memory limit:512 MB

You are given a list of $n$ integers, and your task is to calculate the number of distinct values in the list.

Input

The first input line has an integer $n$: the number of values.

The second line has $n$ integers $x_1,x_2,\dots,x_n$.

Output

Print one integers: the number of distinct values.

Constraints
Example

Input:
5
2 3 2 2 3


Output:
2